/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/PBDRigidClustering.h
ClusterGroupIndex_ - [Index](API\Runtime\Chaos\Chaos\Index) to join cluster into.Children_ - List of children that should belong to the cluster `Parameters_ - ClusterParticleHandle must be valid, this is the parent cluster body. ProxyGeometry : Collision default for the cluster, automatically generated otherwise. ForceMassOrientation : Inertial alignment into mass space.
[Chaos::FPBDRigidClusteredParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidClusteredParticleHandle) * CreateClusterParticle ( const int32 ClusterGroupIndex, [TArray](API\Runtime\Core\Containers\TArray)< [Chaos::FPBDRigidParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidParticleHandle) * > && Children, const [FClusterCreationParameters](API\Runtime\Chaos\Chaos\FClusterCreationParameters) & Parameters, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [Chaos::FImplicitObject](API\Runtime\Chaos\Chaos\FImplicitObject), ESPMode::ThreadSafe > ProxyGeometry, const [FRigidTransform3](API\Runtime\ChaosCore\Chaos\FRigidTransform3) * ForceMassOrientation, const [FUniqueIdx](API\Runtime\Chaos\Chaos\FUniqueIdx) * ExistingIndex )